engstrom



pril 20 i925.

I. ENGSTROM.

CARRY OVER MECHANISM Original Filed June 1 2, 1922 BYv 3 Sheets-Sheet 1 58 IN VEN TOR. /MA/ W65 TRO/v,

MIS@

l ATTO EY l. ENGSTRQM CARRY OYVER MECHANISM April 2@ 1922 original Filed June 12, 1922 3 shams-sheet 2 INVENTOR. /VAA/E/vasr/GQM BY MW A TTORNEY Apri 2o, 1926.

I. ENGSTROM QARRY VER MEGHANISM 3 sheets-sheet 5 vOriginal Filed June l2, 1922 A TTORNE Y VAN ENGSTRGll/I, OF CECAGO, LLINS.

T0 all 10.710122, t may concern:

Be it known that I, lvl/in Enosraoir, a citizen of the United States, residing at Chicago, in the coimty of Cook and State of Illinois, have invented a new and useful improvement in Carry-@ver iechanisms, of which the following is a specification.

My invention relates to carry-over mechanisms for use "ith adding machines, and is characterized by a construction which stores the carry-over during operation of the adding mechanism and then advances by release of the carry-over mechanism, the stored carry-over values. My mechanism is con: structed so that separate mechanism for each order higher than the lowest is first set in operative position to advance the adding indicator of next higher order than an indicator that passes from its 9 to its 0 l indication, after 'which said separate mecliaisms operate one after the other to advance the adding indicators into which the carrying is to be effected, each one step. ln, this manner the carry-over operationv can not be lost since it is effective only after the operation of the adding indicators has been completed for any complete adding operation, and, furthermore it is impossible for inaccnracy to result from the carrying ope .t-ion since each carrying mechanism opcrates only after the operation of the next carrying mechanism in the series has been completed.

'ihis is a divisional applii'fation of my coiendiug application. Serial No. 507,741, fled June 12, 1022, which latter application :i renewal of my application Serial No.

,025 tiled December 1.1, 1010.

My invention will best be understood by reference to the accompanying drawings showing a preferred embodiment thereof in which 1 shows in plan view an adding mechanism provided with my improved carryo ver mechanism,

Fig. 2 is a view teken along` the line 2--2 in 1 and shows the operating and control mechanism for the adding and carryover mechanism,

Fig. 3 is an enlarged view of the adding mechanism in the operated position of the carry-over mechanism,

Figs. i and 5 are detail views of the holding devices employed in connection with the carry-over mechanism shown in Fig. 3,

Divided and this application led December Fig. 6 is a plan view of part of the adding mechanism removed from the remaining portions thereof,

Fig. 7 is an enlarged vertical sectional view of one of the total indicating wheels removed from its supporting shaft, taken along the line 7-7 in Fig. 8,

Fig. 8 is a sectional view of the parts shown in Fig. 7 taken along the line 8 8, and

F ig. 9 is a left hand elevation of the parts shown in Fig. 7

Similar numerals refer to similar parts throughout the several views.

The operating mechanism of the machine consists, as shown in Fig. 2, primarily of a plurality of ordered operating slides 100 slotted longitudinally and supported longitudinally of the machine by transverse rods 101 and 102 extending between and supported by the side pla-tes of the macnine. Each of the operating slides has near its rear end adownwardly'extending lug 103 carrying a roller 104 for engagement with an op erating lever 105 carried by a rock shaft 106. The rock shaft 106 has rigidly secured thereto a crank 110 carrying at its outer left hand end shown in Fig. 2 a roller 111 which rests against the surface of a cam 112 rigidly secured to the operating shaft 113. An op erating handle not shown is carried by the shaft 113. As a result of the construction described, when the handle is moved forwardly the crank 110 is rotated and with it the rock sha-ft 100. The rock shaft 106 also carries a third lever 11G rigidly secured to 'he rock shaft for engaging the front side of the roller 104i carried by the corresponding operating slide 100. Each of the levers 10F free to turn upon Vthe shaft 106 except as it is prevented therefrom by a helical spring 117 located upon the shaft 10G and engaging at one end the rear edge of the lever 105 and at the other end a pin 118 extending from the lever 116. The spring 117 is made sufliciently strongl to drive all of the mechanism actuated by the operating slide 100 and forms a yielding connection between the operating lever 105 and the shaft 106 permitting continued operation of the shaft 106 if the slide 100 is stopped in its motion before it has been moved an amount corresponding to the full amount of operation of the rock shaft. Each operating slide 100 is in line with stops controlled by a series of keys, not

shown, of the same order, as a result of which the amount of motion of any operating slide for a cycle of operation of the operating shaft is determined by the particular stop of the corresponding rder lying in its path as a result of a particular set-up on the keyboard. After engaging the various stops of the keyboard mechanism, the operating slides remain in their stopped positions for continued forward motion of the operating handle and whenthe operating handle is moved in a backward direction to continue its cycle of operation and the cam l112 is rotated to permit the rock shaft 166 to return to its normal position a returning spring 119 moves said crank and the rock shaft 106 to return the same to nor-mal position, thus rotating the levers 116 which'by their engagement with the rollers 104 move the operating slides and the parts carried thereby to their normal position.

Each of the operating slides 100 has formed on its upper edge a rack 10()a which, as indicated in Figs. 'Z and 8, meshes with an intermediate gear 122 loosely mounted on a supporting shaft 123. Each intermediate gear in turn meshes with a gear 124 carried by the shaft 125 which supports the total indicating wheels. Each of the gears 124 carries a pin 129 which, as more clearly shown in Fig. 8, carries an operating pawl 130 foi engaging the teeth of a ratchet wheel 131 carried by a 4total indicating wheel 132. Each of the gears 124 carries a spring tending to hold its pawl 130 in engagement with the ratchet wheel 131. As a. result of the construction described, when one of the operating slides 100 is moved toward the front of the machine the pawl 130 of the corresponding order is vmoved backward on its ratchet wheel 131 a corresponding amount and when the said operating slide is returned to its normal position the ratchet wheel 131 and the total indicating wheel 132 connected therewith are -advanced an amount corresponding to the motion of the operating slide anc, therefore, corresponding to the setup of the corresponding series of keys of the keyboard.

An ordered carry-over mechanism is provided in connection with the total indicati ng mechanism constructed as follows: A plurality of spaced plates is supported in vertical position ylon,gitudinally of the machine onthe transverse rods 146, 147 and 14S, which rods are rigidly supported by the side plates 126 and 12'@ of the adding mechanism. Each `ofthe plates 145 is provided with a downwardly extending arm 145Et to the lower end of which is pivoted at 149 a lever 150. The pivot 149 also supports a second lever 151 which is normally held by a spring 152 against a lug 153 carried by the lever 150. The lever 151 has pivoted to its lower end at 154 a latch 155 normally held in engagement with a lug 156 on the lever 151 by a spring 15'?. The latch 155 has a downwardly extending arm in the path of a pin 153 carried by the corresponding lever 116, as a result of which, when the lever 116 is moved forwardly by the operation of the rock shaft 106, the lever 151 is rotated upon its pivot 149, Which, through the operation of the spring 152 also rotates the lever upon said pivot. The spring 152 permits the lever 116 to move the lever 150 the full amount of possible motion of the lat-ter, after which continued motion of the lever 116 moves the lever 151 relatively to the lever `150 to permit the pin 158 to pass the lower end of the latch 155. When the lever 116 is returned to its normal position the spring 15? yields to permit the latch 155 to turn upon its pivot 154 thus permitting the pin 156 to pass the latch 155 without motion of the levers 151 and 150 to their normal position.

As more clearly shown in Fig. 3, each of the levers 156 carries at its .upper end a pin 159 working in a slot 166 in the lower end of the short of bell crank carry over pawl 161, which is pivotally supported at 162 on a sliding plate 163 mounted upon rods 164 and 165 extending between and carried by the side plates 126 and 127 ofthe adding mechanism. Slots 166 and 167 are formed through the plate 163 to permit said plate to move 'transversely of said rods 164 and 165 in a horizontal direction. The carry over pawl 161 is provided with an upwardly extending arm 161 the end of which is in the plano of one of the ratchet wheels 131. The pawl has two positions, first, its operative or upper position in which the end of the arm 161a engages the ratchet wheel 131 when the plate 163 moves toward the. front of the machine, and an inoperative or lower position for which the end of the arm 161?L clears said ratchet wheel when the plate 163 is reciprocated on its supporting rods 164 and 165. rilhe long arm of the carry-over pawl 161 is' extended beyond the arm v1611to engage a holding latch 166 which, when in engagement with the carry-over pawl, holds it in its lower or inoperative position. A. torsion spring 169 is supported on a stud 170 extending from the plate 163 and the ends of this` spring engage respectively a post or lug 171 projecting' from the vplate 163 and a lug 12 proliecting from the carrying l leer its left hand end, as shown l 3, th carrying pawl is provided with a slot 1 for eceiving a headed stud 174 carried by the plate 163 to guide and hold the left hand end of the carrying pawl 161in proper position relatively to its snpporting plate 1623. The holding latch 163 is rigidi;T secured to a tripping lever 175 which, together with Lthe holding latch 'is pivote-.lily supported upon a stud 176 projecting from and carried by the plate 163.

The tripping lever is in the plane of an operating lug 177 carried by the total indicating wheel 132v of next lower order as a result of which7 when the wheel 1.32 of said lower order passes from its nine 'to its Zero indication, the operating lug' 177 engages the tripping lever 175 to move the holding latch 168 from engagement with the left linnd end of the carrying pawl 161 thns permitting the spring 169' to raise the cerrying pawl to its operating position, for which position subsequent motion of the piate 163 and the carrying pawl towards the front end of the machine advances the ratchet wheel 131 and the total indicating wheel 132 of next higher order one nnit. Ei spring 78 carried by the stud 176 is provided which tends to hold the tripping lever 175 and the holding latch 168 in the position indicated iin Fig. 3, the ends of said spring resting respectively against a pin 179 and the connecting ineniber between the tripping lever 175 and the holding' latch 168. TWhen the tripping lever 17e is ictus ated by the projecting lng 177i the lower end of the latch 168 is m ved Ainto a oleavi slot 180 formed through the left hand end of the carrying pawl 161, the edge of which slot holds said latch and tripping inembe .in the position into which they are mover l j'fy the lng 177' as long as the carrying pawl 161 is in its raised position.

A holding pawl 18.1 pivot-ally sugported upon the rod 165 provided for each o34 the ratchet wheels' 131 for preventing baclf: rotation of said ratchet wheel and the ongaging end of the holding pewl is rounded as indicated at 181fL to itly more the ratchet wheel 131 to its proper angular position7 assuming that the operation in a forward direction of the ratchet wheel 13- either the corr ending operating slide or by the carrying pawl not quite suiiicient for the corresponding tooth to quite clear the end of the holding pawl. The holding pawl 181 therefore not only serves to prevent baci: rotation of the ratchet wheel but also serves to bring said ratchet wheel and the total indicating wheel 132 secured thereto into alignment with the reading line of the total indication of the total indicating wheels. llach holding` oawl 181 provided with a laterally extending erin 181 which has an car 181 connected with its other end and lying in a plane parallel with the holding pawl and provided with an opening' for receiving the rod 1657 the ear 181C and the holding pawl 181 being so spaced as indicated in 1 by the 181 as to serre as a spacer for hoiding the plate 163 against the plate 1415. This construction is' more clearly shown in lFig. 6. A spring 182 is provided for each holding pawl 1817 which spring is mounted upon rod 165 between the ear 181C and the pawl 181 with its ends extending into engagen'ient with the arm 181b and a. pin 183 carried by and extending away from the observer from the next nlate 14115) or towards the observerI from the particular devi-ces shown in Each of the plates 1115 has formed on its left hand edge a forwardly projiecting arm 184v which carries at its forward end a horizontally projecting ear 185 for pivotally supporting at 186 a detent 187 for engaging a vertical flange 163a extending laterally from the forward edge of the sliding plate 163 when said sliding plate is moved to its operated position5 the end of the detent being provider9 as indicated in 1, with a shouldered portion 181NLL for securing a desired amount of engoaement between said detent and said flange. Each detent 187 carries a downwardly extending lng 187D for receiving one end of a helical spring 188 the other end of which is supported upon the pin 171, as a result of which the spring 188 tends to move the detent 187 into its holding position for retaining the corre` spending sliding plate 168 in its operated position when said sliding plate has been moved by the lever 150 to said operated posi`1 tion. nEhe spring 188 also tends to return said sliding plate 163 from its operated posiH tion to its normal position when such 1no tion is permitted by the withdrawal of the corresponding dctent 187. Each of the detents 187 is provided with a tripping arm 187c engaged by the forward edge of the sliding plate 163 above its flange 163EL of next lower order than the sliding plate 163 engaged by the detent 187, as a result of which. when a sliding plate 163 of lower order is released and returned to its normal position by the operation of its spring 1887 it engages the tripping arin 187c of the dctent 187 of next higher order and moves said detent against the action of its spring 188 into releasing posit-ion, thus permitting the corresponding sliding plate to return to its normal positionl1 which in turn releases the detent of next higher order, and on throughout the entire series of sliding plates, as a result of which the carrynig pawls 161 move from their operated position towards the front end of the machine one after another beginning with the carrying pawl of lowest order and each carrying pawl coinpletes its carrying operation beforel Vthe carrying pawl of next lig/'her order begins its forward movement. r1`he.tripping arm 187d carried by the detent 187 of lowest order has ts free end bent downwardly as ind'cated more clearly in Fig. 5 for effective engagement with a downwardly extending arni 181) carried by a rocking member 190 rigidly secured to a rock shaft 88.

r1`he shaft 113 has rigidly secured thereto a second cani 225 which engages a roller 523d when the handle begins its motion towards the front of the machine, and is provided with a delay Surf ce holding the roller 232 in operated position during the inajor part of 'the motion of the handle and until just before said handle reaches its position of rest on its backward stroke. The roller 232 is carried by a lever 23% pivotally supported by the frame of the machine at 235. rllhe lever 234 has a projecting arm 22E-t carrying a pin 236 engaging the forli ,o end of an arm 237 carried by the shaft 88. A spring 238 is connected with the lever 23e, tending to hold said lever in the position indicated in YFig. 2. As a result of this con truction the shaft 88 is recited in a counterrlocl-wise direction by the beginning of the movement of the shaft 113 to move the slides 100 to wards the front of the machine, which roel;- ing of the shaft. 88 places the arni 189 in the position shown in Fig. 3, in which position it remains while the shaft 113 is completing its cycle of operation, or in other words until just before it reaches its position of rest indicated in Fig. 2, by which time the total indicating wheels have been operated by the return movement of the slides 1GO and the carry over pawls have been released to carry into the indicating wheels anyA units required by the amount j ust added to the previous indication of the wheels. The roller 232 is then released from the cani 225, the spring 288 rocks the shaft 88 in clock-wise direction as seen in Figs. 2 and 3, the arm 189 engages the tripping arm 18T@ andthe detent 187 of lowest order is released and the carrying operation is ehlected in the manner described.

As a result of the construction described, it will be seen taat the sliding plates of the carry-over mechanism are moved to heir operated position by forward mot-ion of the operating handle, in which position said sliding plates are held by the detents 18'? during the return Vmovement of the operating handle the total indicating wheels 132 are operated and each. is advanced an amount corresponding to the set-up of the keyboard for the corresponding order 0"; units; each of the total indicating wheels` which passes during its at rance to its .Zero position actuates the tripping lever 175 con` nected with the holding` latch of next higher order thus permitting the carrying pawi or said higher order to move to its upper or operative position, after which continued movement of the operating handle in its backward direction at the end of its oper ating cycle results in a rocking of the shait 88, so that the rocking member 190 release: the detent 187 of lowest orc er which permits the sliding` plate 163 of lowest order to more to its forward position and this by the release of the second detent permits the movement of the second sliding plate 163 to its forassises ward position, and so on throughout the series of sliding plates, thus moving the carrying pawls one after another to their forward position and only advancing the total- 'ser wheels corr spending to the carrying pawls previously released from their holding latches, each one unit. As a result of this sequence of operation, there is no possibility of simultaneous operation of the total indicating wheels by the operating slides and the carrying pawls and there is, furtiier, no possibility of simultaneous operation of the carrying pawls to operate the total indicating wheels which insures that the correct amount of advance shall be imparted to each total indicating wheel by a complete cycle of operation to add to the previous total indication the amount set up on the keyboard mechanism.

After the operation of the adding mechanism as described, the forward motion of the operating handle during the next cycle of operation again returns the sliding plates 163 to their rear position and at the same time, through the operation of the levers 150 rpon the carrying pawls 161, of the carrying pawls released during the preceding cycle of operation are inoved downwardly and held by their holding latches in their lower `position until again released by trie operation of the total indicating wheels in the manner above described.

Provision is made for setting all of the total indicating` wheels to their Zero position, as follows: rllhe shaft 125 as shown in Fig. 8 is provided with a longitudinal leyway 125iL for receiving the free ends of the pawls 132d pivotally mounted inside of the ratchet wheels 131, as more clearly shown in Figs. 7 and 8. ylhe shaft 125 carries on its end outside of the side plate 12'.7 a setting knob 2110, which is rigidly secured to said shaft. The pawls 132a are so arranged that since the parts of the total indicating mechanism which are mounted on the shaft 125 are free to rotate thereon the total indicatingl wheels may be advanced without moving the supporting shaft 125. l"Vhen, however, the supporting shaft 125 is-rotated in the saine direction as the advance of the total indicatingl wheels by means of the knob 240, the l-eyway 125L engages the free ends of the pawls 32a and rotates the ratchet wheels 181 and the adding wheels 132 in a forward direction and, since the pawls 182e are similarly located angularly of the indicating characters on the adding wheels, the zeros on the adding wheels are brought into line with each other and by continued rotation of the adding wheels, may be brought into the reading` line or position.

lllhile 1 have shown my invention in the particular embodiment above described, it will be understood that 1 do not limit inyself to this enact construction as l may einploy equivalents known to the art at the time of the `tiling of this application without departing from the scope of the appended claims.

TWhat i claim is:

1. Carry-over mechanism for ordered totaiizing indicators comprising the combination of operating mechanism for said totalizing indicators, devices actuated by the operating mechanism for moving` the carryover mechanism to its operative position by each operation of said operating mechanism, and a tripping member actuated by said operating mechanism at the end of each operation thereof for releasing said carry-over mechanism.

2. Carry-over ,mechanism for ordered totalizing indicators comprising the combination of operating mechanism for said totalizing indicators, devices actuated by the operating mechanism for placing the carryover mechanism in operative position by cach operation of said operatingmechanism, a tripping member' actuated by said Operating mechanism at the end of each operation thereof for releasing said carry-over mechanism, said carry-over mechanism having ordered carrying elements, a pawl for holding each carrying element in operative position, and a releasing device for each pawl actuated by movement of the carrying element of nent lower order from its operative position.

3. Carry-over mechanism for ordered totalizing indicators comprising the combination of operating mechanism for said totalizing indicators, devices actuated by the operating mechanism for placing the carryover mechanism in operative position by each operation of said operating mechanism, a tripping member actuated by said operating mechanism at the end of each operation thereof for releasing said carry-over mechanism, said carry-over mechanism having ordered carrying elements, a pawl for holding each carrying element in operative position, a releasing device for each pawl actuated by movement of the carrying element of next lower order from its operative position, each carrying element having a carrying pawl normally held in inoperative position, and a member carried by each total indicator for releasing the carrying pawl of next higher order when said total indicator is advanced to its zero indication.

4i. Carry-over mechanism for ordered total indicator wheels comprising the combination of operating mechanism for said total indicater wheels, said operating mechanism comprising a rock shaft and a set of levers carried by said rock shaft, ordered carry-over slides associated with said total indicating wheels, an arm projecting from each carryover silde, connecting mechanism between said set of levers and said arms for operatslides associated with the total indicating.

wheels, connecting mechanism between said slides and said rock shaft for operating said slid s by motion in one direction of said shaft, and spring actuated dogs in said connecting mechanism for permitting motion in the other direction of said shaft without operation of said carry-over slides.

6. Carry-over mechanism for orderedtotal indicator wheeis comprising the combination of operating mechant-nii for said total indicator whces, aid op rating mechsin con'iprii-sing a roch shaft, ordered carry-crei' slides a sociated with the total indicating wheels, connecting mechanism between said slides and said roc-lr shaft for operating said slides by motion in one direction of said shaft, spring actuated dogs in said connecting mechanism for permitting motion in the other direc-tien of said shaftwithout operation of said carry-over slides, and detente for holding said carryover slides in their operated position.

7. Carry-over mechanism for ordered total indicator wheels coimnising the combination of operating m chanism for said total indicator wheels, said operating mechanism comprising a roclr shaft, ordered carry-over slides associated with the total indicating wheels, connect-ing mechanism between said slides and said roel; shaft for operating said slides by motion in one direction of said shaft, spring actuated dogs in said connecting mechanism for permit` ting motion in' the other' direction of said shaft without operation of said carry-over slides, detente for holding said carry-over slides in their operated position, and a releasing mechanism for each detent operated by the return to normal position of the carry-over slide of the nent lower order.

8. Carry-over mechanism for ordered total indicator wheels comprising the combination of operating mechanism for sai-:l total indicator wheels, said operating mechanism comprising a rock shaft, ordered carry-over slides associated with the total indicating wheels, connecting mechanism between said slides and said rock shaft for operating said slides by motion in one di-l slides, detente for holding said carry-over slides in their operated position, a releasing mechanism for each detent operated by the return to norinal p sition ci the carrywcr slide of the next lower order, devices for releasing the detent of lowest order, and actuating devices between said shalt and said detent releasing devices for releasing said detent of lowest ord r at the end or each cycle oi" operation ot' the shaft.

i). Carry-over mechanism i'or ordered total indicator wheels cormgrising,` the corn.- bination oi" ol t' mechanism for said total indicator wheela-J, said operating nicchanisin coniprising;l a roch shaft, ordered carryover slides associated with the total indicating wheels, connecting; nieclienisin between said slides and said reci; shaft ter operating said slides gy nic-tion in one rcction ont said shaft, spring' actuated in said connecting mechanism "for pernnf ting inotion in the other direction ot sait shaft without operation or s id carry-over slides, detents for holding; said ce-,iry-over slides in their operate-il position, a rcleasi mechanism for each detentoperatcd oy the return to normal position ci the carry-over slide. oi the next lower order, devices 'for releasing the detent of lowest order, actuating devices between said sna't and said detent releasing devices for said releasing detentof lowest order at the end oit each cycle oi' operation 0i the shaft, a carrying` pawl rcarried by each carry-over slide and norinally occupying,` an inoperative position, a spring` tending to inove each carrying; pawl to operative position, a holdingpawl ior retaining each carrying pawl in inoperative position, and a ineinher carried by each total indicating wheel for actuating' the holding pawl to release the carrying: pawl of next higher order when said total indicating wheel rotates'iroin 9 to Zero.

l0. Carry-over mechanism 'for ordered total indicator wheels comprising the coinbination ot operating mechanism 'for said total indicator Wheels, said operating nicchanisin comprising a roclr shaft, ordered carry-over slides associated with the total indicating` wheels, connecting mechanism between saitL slides and said rock shaft. :for operating said slides hy motion in one direction of said shaft, spring actuated dogs in said connecting` mechanism ior perinitting inotion in the other direction of said shaft without operating of said carry-over slides, detents ttor holding; said carry-own slides in their operated position, a releasing mechanism for each detent operated hy the return to noi-:nal position oi the carry-over slide oit the next lower order, devices for releasing' the detent ot' lowest order, actuating,l devices between said shaft and said detent releasing' devices for releasing said detent or lowest order at the end or each cycle oi operation oi thc shait, a carrying pawl carried by each carryover slide and normally occupying an inoperative position, a spring tending to inove each carrying; pawl to operative position, a holding;` pawl for retaining each carrying pawl in inoperative position, a ineinber carried by each total indicating wheel for actuating` the holding pawl to release the carrying pawl oi next higher order when said total indicating wheel rotates frein 9 to Zero, and actuating' devices connecting the carrying pawls with the carry-oy slide operating .mechanism for moving the released carrying pawls to inoperative position for each operation or' the carryeoyer slides.

in witness whereof, l hereunto subscrihe iny naine this 11th day of December, A. D. 1922.

VAN ENGSTROM. 

